The invention discloses a double-stator double-salient motor drive system based on a three-phase nine-switch converter, belonging to the technical field of double-salient motor control. The double-stator double-salient motor is a six-phase double-salient motor with a co-axial two-section rotor mutually staggered angle. The three-phase nine-switch converter is formed by three-phase bridge arms, wherein each bridge arm is provided with three switch tubes: an upper switch tube, a middle switch tube and a lower switch tube; the motor three-phase windings of the first section of the double-stator double-salient motor are respectively connected between the upper switch tube and the middle switch tube of the first bridge arm, between the upper switch tube and the middle switch tube of the second bridge arm, and between the upper switch tube and the middle switch tube of the third bridge arm of the three-phase nine-switch converter; and the U, V, and W three-phase windings of the second section of the double-stator double-salient motor are respectively connected between the middle switch tube and the lower switch tube of the first bridge arm, between the middle switch tube and the lower switch tube of the second bridge arm, and between the middle switch tube and the lower switch tube of the second bridge arm. Compared with a traditional double-stator double-salient motor drive system which utilizes double three-phase inverter topology, for the double-stator double-salient motor drive system based on a three-phase nine-switch converter, the number of the switch devices can be reduced by 25% and the straight-through problem of the bridge arms does not exist.